US5076238A - Process and electronic internal combustion engine control system for cold-start control - Google Patents

Process and electronic internal combustion engine control system for cold-start control Download PDF

Info

Publication number
US5076238A
US5076238A US07/653,655 US65365591A US5076238A US 5076238 A US5076238 A US 5076238A US 65365591 A US65365591 A US 65365591A US 5076238 A US5076238 A US 5076238A
Authority
US
United States
Prior art keywords
cold
ignition
injection pulses
pulses
starting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/653,655
Other languages
English (en)
Inventor
Willi Rosenau
Paul Valenta
Michael Thieme
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Assigned to ROBERT BOSCH GMBH, D-7000 STUTTGART 10, FEDERAL REPUBLIC OF GERMANY reassignment ROBERT BOSCH GMBH, D-7000 STUTTGART 10, FEDERAL REPUBLIC OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROSENAU, WILLI, THIEME, MICHAEL, VALENTA, PAUL
Application granted granted Critical
Publication of US5076238A publication Critical patent/US5076238A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/061—Introducing corrections for particular operating conditions for engine starting or warming up the corrections being time dependent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention is based on a process for cold-start control in an electronic internal combustion engine system with signal generating stages for the fuel metering wherein an increased fuel proportioning is effected during starting, possibly with simultaneous or subsequent injection quantity control, a predetermined quantity of consecutive cold start short-duration injection pulses (ti*) which exceeds by a multiple the quantity of injection pulses (ti) normally issued during conventional cold starting per time unit, and/or per quantity of revolutions, and/or per quantity of ignition times, is fed per every ignition time interval to an end stage for controlling the injection valve or valves, and the generation of the quantity of cold start short-duration injection pulses (ti*) is interrupted as the ignition time intervals due to speed increase become shorter.
  • the invention also relates to an electronic internal combustion engine control system for carrying out the process.
  • Measures for cold-start control or cold-start boosting in fuel metering systems assigned to internal combustion engines, for instance fuel injection systems, carburator and the like, are known (German Auslegeschrift 2,511,974; German Offenlegungsschrift 3,042,245).
  • the known systems are designed in such a way that, while starting an internal combustion engine, in particular in the lower temperature range, a supplementary feed of fuel is metered to the engine in order to compensate for possible condensation losses owing to cold intake pipe walls and cylinder inner walls.
  • German document discloses the temperature- and speed-dependent adjustment of the ignition angle.
  • the amount of fuel supplied in this case follows a certain curve, which is plotted either in relation to time or to the speed of the internal combustion engine during starting, which curve may be shaped such that during a first phase a constant supplementary feed of fuel is supplied until a preset number of ignitions or revolutions of the internal combustion engine is reached (plateau region); following the plateau region there is a supplementary feed reduction phase in which the amount of fuel supplied drops linearly or follows steep-drop functions up to a transition region, which commences for example upon reaching an upper starting speed and characterizes the transition into so-called after-starting enrichment or warm running.
  • a supplementary feed reduction phase in which the amount of fuel supplied drops linearly or follows steep-drop functions up to a transition region, which commences for example upon reaching an upper starting speed and characterizes the transition into so-called after-starting enrichment or warm running.
  • the preset characteristic curves and functions involved here are sometimes difficult to realize and are also complicated, inasmuch as a speed-dependent function and a function dependent on the number of ignitions have to be taken into account at least in the region of the supplementary fuel feed reduction.
  • CSC systems cold-start control systems
  • An object of the invention is therefore based on achieving a simplification of the known cold-start control (CSC) and also ensuring that when the cold-start temperature limit is lowered, an ignitable mixture can always be introduced into the combustion space
  • the invention achieves this object in that the fuel quantity to be injected out per an ignition time interval during the starting phase is divided into equal fuel doses metered according to a sequence of cold start short-duration injection pulses (ti*) having a uniform or constant time interval (y) relative to one another, and the constant time interval (y) is independent from a pregiven division coefficient or divisor (z) such that more cold start short-duration injection pulses fall into long ignition time intervals and fewer cold start short-duration injection pulses fall into short ignition time intervals.
  • the process according to the invention has the advantage that, as empirical investigations have shown, a considerable lowering of the cold-start temperature limit from, in numerical values, -22° C., which is achieved with the known cold-start control systems, to -28° C. could be attained (test conducted on Volvo B23F with automatic gearbox and lead-free winter petrol).
  • the use of the invention succeeds in attaining direct spontaneous starts even in the case of such engine types with which it could not otherwise have been possible to start the internal combustion engine on the basis of conventional cold-start systems and certain temperature conditions.
  • the invention also produces a drastic simplification in the known cold-start control systems with the advantage that a flooding of the engine with fuel is avoided by attaining large wetted surfaces in the combustion space and intake pipe area.
  • the invention makes it possible to dispense with the very accurate coordination of factors, previously necessary, in forming the start characteristic; the internal combustion engine no longer reacts as sensitively as was to be expected and was the case before.
  • the very precise orientation to certain specific cold-start curve progressions which previously could ensure starting in critical conditions, is no longer necessary, the starting behaviour of internal combustion engines becomes uncritical even at low and very low temperatures.
  • FIG. 1 shows, highly schematicised, a circuit diagram of an electronic internal combustion engine control system
  • FIG. 2 shows the progression, known per se, of a former cold-start function from which the designated factors previously necessary for the determination of this function can be taken
  • FIG. 3 shows the progression of the new cold-start function (CS function) realized by the invention
  • FIG. 4a shows, in relation to the occurrence of ignition points (TD) in time, a sequence of the CS short-duration injection pulses, ti*,
  • FIG. 4b shows the function of prior art injection pulses ti n (where n is the number of ignitions TD),
  • FIG. 5 shows a further exemplary embodiment of the invention, with a different sequence of cold-start injection pulses ti*,
  • FIGS. 6, 7 and 8 show, similarly to FIG. 4, sequence diagrams of short pulses, referred to the respective TD n intervals, with determination of the ti* number x from a stored table, with additional indication of slopes in the case of a controlled increase of the ti* width and with additional indication of the engine speed n;
  • FIG. 9 shows a flowchart of a fuel injection program for implementing the embodiment according to FIG. 5,
  • FIG. 10 shows a flowchart of a program for controlling fuel injection valves
  • FIG. 11 shows a program for computing a cold-start injection pulse ti* according to the invention.
  • control signal generation for starting an internal combustion engine having an electronic control system (such as, for example, the assignee's fuel injection system known as LH-Jetronic).
  • the fuel is metered via injection valves, which are intermittently controlled by pulse-width modulated signals.
  • the electronic internal combustion engine control system has a signal generator stage 10 for injection pulses ti, with which injection valves 11 are controlled; also shown, for a more comprehensive understanding, is a signal generator stage 12 for controlling the ignition by means of spark plugs 13.
  • the main input parameters for the two signal generator stages 10 and 12 come from sensors for the engine speed, temperature and load.
  • a start signal is supplied to the injection signal generator stage 10.
  • FIG. 1 The highly schematicised arrangement shown in FIG. 1 merely serves to illustrate the range of application and action of the invention; determinative factors for the invention are the type and design of the function progressions during starting, as indicated in the diagrams which follow. Therefore, a specific circuit for realising the functions, sequences and control programs used by the invention can also be dispensed with, as current internal combustion engine control systems are computer-controlled or microprocessor-controlled and the respective functions and values can be stored in and called from a memory at certain program points.
  • the overall cold-start injection time is subdivided into a range I (plateau region Z ⁇ VNKS) in which the injection time could be determined for example by the prior art injection pulses ti n shown in FIGS.
  • the invention moves away from this concept and proposes dividing the duration of the prior art injection pulses by a preset division factor Z and, using the succession of pulses ti* of reduced pulse width thus obtained, for controlling the injection valves repeatedly, on a linear time base or scale within every ignition timing interval during the cold starting operation. If needed, a further factor is used as a basis for the injection valve control; the beginning of the first injection pulse in each sequence being synchronised furthermore to the recording or reading of battery voltage UBatt and initiated by a signal related to respective ignition points or pulses TD.
  • the pulses ti* of reduced width will be referred to as cold-start short-duration injection pulses ti* or in abbreviated form as short cold-start injection pulses ti*.
  • a first example of sequences of cold start short injection pulses ti* shown in FIG. 4a illustrates the present invention.
  • the variable quotient ##EQU1## depends on the engine speed reached during starting, in other words on the frequency of occurrence of the ignition points or pulses TD and thus on the length of respective ignition intervals TD n .
  • the variable quotient x determines as to how many of the short injection pulses ti* fit into a particular TD n interval. According to FIG.
  • a sequence five short injection pulses ti* is placed in a first ignition time interval TD1 between a first a second ignition pulse TD, while with an increase of engine speed n, only four short injection pulses ti* fit in the second interval TD2.
  • this also results in a feed or fuel delivery reduction, achieved in a comparatively simple and therefore also particularly advantageous way, namely by issuing less short injection pulses ti* with ignition intervals TD n becoming shorter.
  • This feature also produces the continuous transitory progression of the cold-start function corresponding to FIG. 3 simply with the ignition timing intervals becoming smaller up to reaching the upper cold starting speed threshold NST3T.
  • the sequence x of uniformly spaced cold-start injection pulses ti* which fit in each case into an ignition timing interval TD n has the effect of producing a substantially better atomization of the fuel which is so fine that ignitability is already achieved virtually immediately after the beginning of starting.
  • the preset constant time interval y between respective short duration fuel injection pulses ti* is less than a minimum half-period of the crankshaft rotation occurring at a time interval TD4 between the fourth and the fifth ignition pulse TD, and the width or duration (W) of the control pulses ti* being less than the duration of the ignition pulse TD.
  • W width or duration
  • the prior art progression of the cold-start injection pulses ti can also be seen in the plateau range Z ⁇ ; the invention achieves the effect that the ejected so-called FKST-ti fuel quantity is atomized so finely that an ignitable mixture is produced spontaneously and immediately.
  • a counter being actuated at a preset frequency, for instance 100 Hz, a time slot pattern of x pulses being formed with the first ignition pulse (1st TD) by a computer, as indicated in the progression of FIG. 5, with which slot pattern the final stage for the injection valves is controlled.
  • x ti* pulses are issued between two ignitions, the x-fold ti* being re-started at the next interrupt occurring whenever the respective ignition interval TD n is greater than the interval y of the xth pulse ti* in the corresponding pulse sequence.
  • the preferred numerical values for the divisor z lie between 4 and 16, within which range the sub-division of the plurality of the cold-start injection pulses can be preferably arranged, taking into account the change of pickup and dropout times of the injection valves with low battery voltage.
  • t s is the correction pulse added as a function of U BAtt .
  • the cold-start feed supplied in this way during the ignition intervals TD n can be reduced, on the basis of the instructions from the table, over the increasing crankshaft revolutions in order to prevent the mixture becoming too rich.
  • the number of injections x between two ignitions is thus a function of the time ( ⁇ t from TD to TD) after starting. This reduction takes place by taking into account the recorded number of crankshaft revolutions per unit of time, and not by means of the expiry of the period between two TD pulses, as in the case of the sequences of FIG. 4.
  • the possible choice of the short pulse time interval y in each case also comes into play.
  • FIG. 9 shows a flowchart of a computer program for controlling the cold-start fuel injection according to the process shown in FIG. 5.
  • step S5 If the threshold NST3 has NOT been reached, it is tested in step S5, whether a computed number X of the cold-start injection pulses ti* has been injected out during the current ignition interval. If YES, injections till the next ignition time point TD are interrupted (step S6). If NO, it is tested in step S7, whether a pregiven time scale or base has not yet expired. If NOT, an additional cold-start injection pulse ti* is applied to the injection valve in step S8. At the same time, the count of a counter of the cold-start injection pulses is incremented by 1. Upon the occurrence of a next ignition pulse TD, it is tested in step S9 whether the number of cold-start ignition intervals has reached a given limit, e.g.
  • step S22 the cold-start factor FKSTT is computed as a function of temperature.
  • step S26 the duration of the cold-start injection pulse ti* is computed according to the formula: ##EQU3## and the program advances to step S2 in FIG. 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US07/653,655 1986-05-21 1991-02-11 Process and electronic internal combustion engine control system for cold-start control Expired - Fee Related US5076238A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617104 1986-05-21
DE19863617104 DE3617104A1 (de) 1986-05-21 1986-05-21 Verfahren und elektronisches brennkraftmaschinensteuersystem zur kaltstartsteuerung

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07492605 Continuation-In-Part 1990-03-12

Publications (1)

Publication Number Publication Date
US5076238A true US5076238A (en) 1991-12-31

Family

ID=6301310

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/653,655 Expired - Fee Related US5076238A (en) 1986-05-21 1991-02-11 Process and electronic internal combustion engine control system for cold-start control

Country Status (6)

Country Link
US (1) US5076238A (ko)
EP (1) EP0307393B1 (ko)
JP (1) JPH01502600A (ko)
KR (2) KR950000912B1 (ko)
DE (2) DE3617104A1 (ko)
WO (1) WO1987007329A1 (ko)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186155A (en) * 1990-12-27 1993-02-16 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control method for internal combustion engines
US6050243A (en) * 1998-07-17 2000-04-18 General Motors Corporation Internal combustion engine control
US6360531B1 (en) 2000-08-29 2002-03-26 Ford Global Technologies, Inc. System and method for reducing vehicle emissions
US20060042590A1 (en) * 2002-07-12 2006-03-02 Uplap Rahul R Start-up control of internal combustion engines
US20060094566A1 (en) * 2004-11-03 2006-05-04 Keeler David H High frequency vaporized fuel injector
US20070023012A1 (en) * 2005-07-26 2007-02-01 Toyota Jidosha Kabushiki Kaisha Controller for direct-injection internal combustion engine and method of controlling the direct-injection internal combustion engine
GB2446691A (en) * 2007-02-15 2008-08-20 Ford Global Tech Llc Method for starting a direct injection internal combustion engine comprising adjusting a number of injections per combustion cycle
US20090222195A1 (en) * 2008-01-28 2009-09-03 Gm Global Technology Operations, Inc. Method for controlling two consecutive injection pulses in an electrically-actuated fuel injector system for an internal combustion engine, particularly a diesel engine
US20110132330A1 (en) * 2009-12-23 2011-06-09 Ford Global Technologies, Llc System and Method for Injecting Fuel to a Gaseous Fueled Engine
US8474432B2 (en) 2007-02-15 2013-07-02 Ford Global Technologies, Llc Event-based direct injection engine starting with a variable number of injections
US20150144107A1 (en) * 2012-06-27 2015-05-28 Perkins Engines Company Limited Method of Controlling Fuel to be Injected within a Combustion Engine
US20160017851A1 (en) * 2013-04-09 2016-01-21 Toyota Jidosha Kabushiki Kaisha Fuel injection amount control device
US9347390B2 (en) 2013-03-20 2016-05-24 Ford Global Technologies, Llc Engine de-choking in response to an engine flood event

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05214985A (ja) * 1992-02-05 1993-08-24 Fuji Heavy Ind Ltd エンジンの燃料噴射制御方法
DE19728721A1 (de) * 1997-07-04 1999-01-07 Bayerische Motoren Werke Ag Verfahren zum Zumessen einer Kraftstoffmenge im Startfall einer Brennkraftmaschine
DE10115969B4 (de) * 2001-03-27 2010-04-01 Volkswagen Ag Verfahren zur Ermittlung einer zugeführten Kraftstoffmenge während eines Startvorganges einer Verbrennungskraftmaschine
US6701895B1 (en) * 2003-02-26 2004-03-09 Ford Global Technologies, Llc Cylinder event based spark

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683859A (en) * 1984-11-09 1987-08-04 Nippondenso Co., Ltd. Apparatus for injecting fuel into internal combustion engine
US4691680A (en) * 1986-05-22 1987-09-08 Brunswick Corporation Starting-enrichment control for a fuel-injected engine
US4719885A (en) * 1986-01-31 1988-01-19 Hitachi, Ltd. Electronic control fuel injection device
US4765300A (en) * 1986-12-27 1988-08-23 Honda Giken Kogyo K.K. Fuel supply control method for internal combustion engines after starting in hot state
US4785771A (en) * 1985-05-10 1988-11-22 Nippondenso Co., Ltd. Fuel injection control apparatus with forced fuel injection during engine startup period
US4873950A (en) * 1987-08-28 1989-10-17 Fuji Jukogyo Kabushiki Kaisha Engine start control apparatus
US4998522A (en) * 1988-11-28 1991-03-12 Siemens Aktiengesellschaft Method for injecting fuel into an internal-combustion engine
US5009211A (en) * 1989-02-23 1991-04-23 Honda Giken Kogyo Kabushiki Kaisha Fuel injection controlling device for two-cycle engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1598748A (ko) * 1968-05-06 1970-07-06
FR2151715A5 (ko) * 1971-09-10 1973-04-20 Sopromi Soc Proc Modern Inject
GB2047351B (en) * 1979-04-21 1982-11-10 Lucas Industries Ltd Control of fuel injection systems for starting i c engines
DE3042245A1 (de) * 1980-11-08 1982-06-09 Robert Bosch Gmbh, 7000 Stuttgart Elektronisches brennkraftmaschinensteuersystem
JPS5844232A (ja) * 1981-09-10 1983-03-15 Nippon Denso Co Ltd 内燃機関用燃料噴射装置
JPS58220934A (ja) * 1982-06-16 1983-12-22 Honda Motor Co Ltd 内燃エンジンの加速時燃料供給制御方法
JPH0610439B2 (ja) * 1985-08-01 1994-02-09 日産自動車株式会社 電子制御燃料噴射装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683859A (en) * 1984-11-09 1987-08-04 Nippondenso Co., Ltd. Apparatus for injecting fuel into internal combustion engine
US4785771A (en) * 1985-05-10 1988-11-22 Nippondenso Co., Ltd. Fuel injection control apparatus with forced fuel injection during engine startup period
US4719885A (en) * 1986-01-31 1988-01-19 Hitachi, Ltd. Electronic control fuel injection device
US4691680A (en) * 1986-05-22 1987-09-08 Brunswick Corporation Starting-enrichment control for a fuel-injected engine
US4765300A (en) * 1986-12-27 1988-08-23 Honda Giken Kogyo K.K. Fuel supply control method for internal combustion engines after starting in hot state
US4873950A (en) * 1987-08-28 1989-10-17 Fuji Jukogyo Kabushiki Kaisha Engine start control apparatus
US4998522A (en) * 1988-11-28 1991-03-12 Siemens Aktiengesellschaft Method for injecting fuel into an internal-combustion engine
US5009211A (en) * 1989-02-23 1991-04-23 Honda Giken Kogyo Kabushiki Kaisha Fuel injection controlling device for two-cycle engine

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186155A (en) * 1990-12-27 1993-02-16 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control method for internal combustion engines
US6050243A (en) * 1998-07-17 2000-04-18 General Motors Corporation Internal combustion engine control
US6360531B1 (en) 2000-08-29 2002-03-26 Ford Global Technologies, Inc. System and method for reducing vehicle emissions
US20090120408A1 (en) * 2002-07-12 2009-05-14 Uplap Rahul R Start-UP control of internal combustion engines
US20060042590A1 (en) * 2002-07-12 2006-03-02 Uplap Rahul R Start-up control of internal combustion engines
US8166942B2 (en) 2002-07-12 2012-05-01 Cummins Inc. Start-up control of internal combustion engines
US7481200B2 (en) 2002-07-12 2009-01-27 Cummins Engine Company, Inc. Start-up control of internal combustion engines
US20060094566A1 (en) * 2004-11-03 2006-05-04 Keeler David H High frequency vaporized fuel injector
US7481205B2 (en) 2004-11-03 2009-01-27 Philip Morris Usa Inc. High frequency vaporized fuel injector
US20070023012A1 (en) * 2005-07-26 2007-02-01 Toyota Jidosha Kabushiki Kaisha Controller for direct-injection internal combustion engine and method of controlling the direct-injection internal combustion engine
US7308887B2 (en) * 2005-07-26 2007-12-18 Toyota Jidosha Kabushiki Kaisha Controller for direct-injection internal combustion engine and method of controlling the direct-injection internal combustion engine
US20110100314A1 (en) * 2007-02-15 2011-05-05 Ford Global Technologies, Llc. Direct injection event-based engine starting
US8656881B2 (en) 2007-02-15 2014-02-25 Ford Global Technologies, Llc Direct injection event-based engine starting
US7866303B2 (en) 2007-02-15 2011-01-11 Ford Global Technologies, Llc Direct injection event-based engine starting
US20080196696A1 (en) * 2007-02-15 2008-08-21 Eric Storhok Direct injection event-based engine starting
US9222423B2 (en) 2007-02-15 2015-12-29 Ford Global Technologies, Llc Direct injection event-based engine starting
GB2446691B (en) * 2007-02-15 2011-08-31 Ford Global Tech Llc Method for starting an engine
US8146557B2 (en) 2007-02-15 2012-04-03 Ford Global Technologies, Llc Direct injection event-based engine starting
GB2446691A (en) * 2007-02-15 2008-08-20 Ford Global Tech Llc Method for starting a direct injection internal combustion engine comprising adjusting a number of injections per combustion cycle
US8474432B2 (en) 2007-02-15 2013-07-02 Ford Global Technologies, Llc Event-based direct injection engine starting with a variable number of injections
US8561587B2 (en) 2007-02-15 2013-10-22 Ford Global Technologies, Llc Direct injection event-based engine starting
US8103426B2 (en) * 2008-01-28 2012-01-24 GM Global Technology Operations LLC Method for controlling two consecutive injection pulses in an electrically-actuated fuel injector system for an internal combustion engine, particularly a diesel engine
US20090222195A1 (en) * 2008-01-28 2009-09-03 Gm Global Technology Operations, Inc. Method for controlling two consecutive injection pulses in an electrically-actuated fuel injector system for an internal combustion engine, particularly a diesel engine
US8347862B2 (en) * 2009-12-23 2013-01-08 Ford Global Technologies, Llc System and method for injecting fuel to a gaseous fueled engine
US20110132330A1 (en) * 2009-12-23 2011-06-09 Ford Global Technologies, Llc System and Method for Injecting Fuel to a Gaseous Fueled Engine
US20150144107A1 (en) * 2012-06-27 2015-05-28 Perkins Engines Company Limited Method of Controlling Fuel to be Injected within a Combustion Engine
US9879632B2 (en) * 2012-06-27 2018-01-30 Perkins Engines Company Limited Method of controlling fuel to be injected within a combustion engine
US9347390B2 (en) 2013-03-20 2016-05-24 Ford Global Technologies, Llc Engine de-choking in response to an engine flood event
US20160017851A1 (en) * 2013-04-09 2016-01-21 Toyota Jidosha Kabushiki Kaisha Fuel injection amount control device
US9951732B2 (en) * 2013-04-09 2018-04-24 Toyota Jidosha Kabushiki Kaisha Fuel injection amount control device

Also Published As

Publication number Publication date
KR950000912B1 (ko) 1995-02-03
JPH01502600A (ja) 1989-09-07
DE3764271D1 (de) 1990-09-13
EP0307393A1 (de) 1989-03-22
KR887001321A (ko) 1988-07-26
DE3617104A1 (de) 1987-11-26
WO1987007329A1 (en) 1987-12-03
EP0307393B1 (de) 1990-08-08

Similar Documents

Publication Publication Date Title
US5076238A (en) Process and electronic internal combustion engine control system for cold-start control
US4373489A (en) Spark timing control system
US4658787A (en) Method and apparatus for engine control
US4148282A (en) Method and apparatus for cold starting fuel injected internal combustion engines
US3867916A (en) Internal combustion engine ignition control system
US4309971A (en) Adaptive air/fuel ratio controller for internal combustion engine
EP0051723B1 (de) Verfahren zum Betrieb eines elektronischen Steuersystems einer Brennkraftmaschine
US4436073A (en) Method of and apparatus for controlling the fuel feeding rate of an internal combustion engine
US4198936A (en) System to control the on-off time of a pulse train of variable frequency, particularly the dwell time of ignition signals for an internal combustion engine
US4232642A (en) Ignition timing control system for internal combustion engines
US4184460A (en) Electronically-controlled fuel injection system
US4133326A (en) Fuel control system for an internal combustion engine
JPS6029824B2 (ja) 内燃機関の低温始動方法および装置
US4140087A (en) Method and apparatus for generating fuel injection valve control pulses
US4516550A (en) Electronic control device for a fuel metering system of an internal combustion engine with self-ignition
US3982519A (en) Electronic-fuel-injection-system enrichment circuit for use during engine cranking
US4270503A (en) Closed loop air/fuel ratio control system
US4683859A (en) Apparatus for injecting fuel into internal combustion engine
US4262644A (en) Spark timing control circuit for controlling the timing of spark ignition of an internal combustion engine
JPH03172577A (ja) エンジンのアイドル回転数制御装置
US5138987A (en) Process for heating the intake air internal combustion engines by means of a flame starting system
US4290400A (en) Closed loop fuel control system for an internal combustion engine
US4589391A (en) Controlling device for the start of injection in an internal combustion engine operating with self-ignition
US4250853A (en) Method and apparatus for controlling the fuel supply of an internal combustion engine
US4208991A (en) Anti-flood circuit for use with an electronic fuel injection system

Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, D-7000 STUTTGART 10, FEDERAL RE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:ROSENAU, WILLI;VALENTA, PAUL;THIEME, MICHAEL;REEL/FRAME:005621/0141

Effective date: 19910128

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FEPP Fee payment procedure

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19991231

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362